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13

L Series Water Flow Meter Operation

The L Series can have several screen “modes” depending on how the device is ordered. All L Series 

meters have a default Main Mode, Select Menu Mode, a Communication Select Mode, a Manufacturer 

Data  Mode  and  a  Miscellaneous  Mode.  (In  addition,  your  meter  may  have  been  ordered  with  the 

Totalizing Mode option, see page 34.) The device defaults to Main Mode as soon as power is applied 

to the meter.

Note

: 

L Series Flow Meters may also be powered with the 9 Volt Battery Pack described on page 35.

Main Mode

The main mode screen shows the flow in the units specified at time of order, the line pressure in PSIG, 

and the process temperature in degrees Celsius. The following parameters are displayed in the main 

mode as shown in Figure 7:

 PSIG         

o

C          Tare

  +23.47      +22.73

 

 

 

 

 

  

 

 

 

 

 

 CCM

   

 

 

 

 

 Water

    

  

+0.000

  Volume                   Main

Figure 7. Main Mode Display, L Series Flow Meter

 The “MODE” button in the lower right hand corner toggles the display between modes.

Tare 

– Pushing the dynamically labeled Tare button in the upper right hand corner tares the flow meter 

and provides it with a reference point for zero flow. 

This is a very simple but important step in obtaining 

accurate measurements

. It is good practice to “zero” the flow meter each time it is powered up and 

whenever a known zero flow condition exists. If the flow reading varies significantly from zero after an 

initial tare, give the unit a minute or so to warm up and re-zero it. If possible, it is helpful to zero the unit 

near the expected operating pressure by positively blocking

 the flow downstream of the flow meter prior 

to pushing the “Tare” button. Zeroing the unit while there is 

any

 flow will directly affect the accuracy by 

providing a false zero point. It is not uncommon for a meter to read a small value when it is removed 

from the process line as water can “hang” in one or both of the differential pressure sensor ports. If the 

unit reads a significant negative value when removed from the line and blocked, it is a good indication 

that it was given a false zero.

Note:

 A remote tare can be achieved by momentarily grounding pin 4 to tare as shown in Figure  8 on 

page 14.

Summary of Contents for 16 Series

Page 1: ...Operating Manual 16 Series Precision Water Flow Meter and Water Flow Controller Innovative Flow and Pressure Solutions ...

Page 2: ...t with available replacement parts or upgrade the Product to a current commercially available version of the original Product Should upgrading the Product be deemed necessary by Alicat Buyer hereby agrees to pay an upgrade fee equal to seventy percent of the retail value of the replacement Product Alicat Scientific hereunder makes no claim that replacement Products will look function or operate in...

Page 3: ...ut Signal 11 Optional 2nd Analog Output Signal 11 L Series Water Flow Meter Operation 13 Main Mode 13 Tare 13 Line Pressure 14 Line Temperature 14 Volume 14 Flashing Error Message 14 Select Menu Mode 14 Communication Select Mode 15 Unit ID 15 Baud 15 Data Rate 15 Manufacturer Data 16 Miscellaneous Mode 16 LCD Contrast 17 Display Zero Deadband 17 Pressure Averaging 17 Flow Averaging 17 LC Series Vo...

Page 4: ...e 37 Option Remote Electronics 38 Accessory BB 9 Multi Drop Box 38 Accessory RS 232 to RS 485 Converter 38 Accessory Flow Vision 39 Accessories 40 Table of Figures Figure 1 Bleed Ports 8 Figure 2 8 Pin Mini DIN Connector 9 Figure 3 Simple Method for Providing Set Point to Controllers 10 Figure 4 Mini DIN to DB 9 Connection for RS 232 Signals 11 Figure 5 Typical Multiple Device Addressable Wiring C...

Page 5: ...1 Static pressure at the inlet P2 Static pressure at the outlet r Radius of the restriction η eta absolute viscosity of the fluid L Length of the restriction Since p r and L are constant Equation 1 can be rewritten as Q K P η Equation 2 Where K is a constant factor determined by the geometry of the restriction Equation 2 shows the linear relationship between volumetric flow rate Q differential pre...

Page 6: ... The controller utilizes what is called PID Proportional Integral Derivative loop control circuitry and software The PID loop control works by repeatedly comparing the measured flow rate to the set point and incrementally adjusting the voltage signal to the valve in a continuous attempt to match the measured flow rate to the set point For example at any given time the controller looks at the measu...

Page 7: ... All L Series Meters and LC Series Controllers have mounting holes for convenient mounting to flat panels These meters are position insensitive and can be mounted in any orientation The sizes and dimensions for the mounting holes are shown on pages 30 33 Note For applications that may continuously introduce occasional air bubbles to the flow stream upstream of the device the device may be mounted ...

Page 8: ...l care to avoid any live electrical devices or lines With the meter controller installed and line pressure applied gently loosen the upstream bleed port screw 1 2 turns or until water begins to leak from the threads DO NOT REMOVE THE SCREW as the port is subject to line pressures and injury equipment damage or loss of required parts may result Gently tap the flow body a wooden or plastic screwdriv...

Page 9: ...A 5Vdc 10Vdc or Basic Alarm Brown 3 RS 232 Input Signal Red 4 Analog Input Signal Remote Tare Meters see Figure 8 Set Point In Controllers see Figure 3 Orange 5 RS 232 Output Signal Yellow 6 0 5 Vdc or 0 10 Vdc Output Signal Green 7 Power In as descibed above Blue 8 Ground common for power communications and signals Purple Note The above pin out is applicable to all the flow meters and controllers...

Page 10: ...rial port as shown in Figure 4 Adapter cables are available from Alicat see Accessories page 40 or they can be constructed in the field with parts from a local electronic supply house In Figure 4 note that the diagrams represent the port side of the connections i e the connector on top of the meter and the physical DB 9 serial port on the back of the computer The cable ends will be mirror images o...

Page 11: ...er was ordered with a 4 20 mA current output signal it will be available on Pin 1 See the Calibration Data Sheet that shipped with your device to determine which output signals were ordered The current signal is 4 mA at 0 flow and 20 mA at the meter s full scale flow The output current is linear over the entire range Ground for this signal is common on Pin 8 Current output units require 15 30Vdc p...

Page 12: ... industrial connector is also available 1 6 5 4 3 2 Pin Function Cable Color 1 Power In Red 2 RS 232 Output Blue 3 RS 232 Input Signal White 4 Remote Tare Ground to Tare Green 5 Ground commom for power communications and signals Black 6 Signal Out Voltage or Current as ordered Brown Figure 6 Optional Industrial Connector Note The above pin out is applicable to all the flow meters and controllers o...

Page 13: ... dynamically labeled Tare button in the upper right hand corner tares the flow meter and provides it with a reference point for zero flow This is a very simple but important step in obtaining accurate measurements It is good practice to zero the flow meter each time it is powered up and whenever a known zero flow condition exists If the flow reading varies significantly from zero after an initial ...

Page 14: ...ture overrange when a measured parameter exceeds the range of the sensors in the device When any item flashes on the display neither the flashing parameter nor the flow measurement is accurate Reducing the value of the flashing parameter to within specified limits will return the unit to normal operation and accuracy Figure 8 Proper Set Up for Remote Tare on Meters Momentarily ground Pin 4 to Tare...

Page 15: ...s the rate at which data is passed back and forth between the instrument and the computer Both devices must send receive at the same baud rate in order for the devices to communicate via RS 232 The default baud rate for these devices is 19200 baud sometimes referred to as 19 2K baud To change the baud rate in the Communication Select Mode press the Select button in the upper left corner of the dis...

Page 16: ...520 290 0109 Mfg 1 Main Model L 10LPM D Serial No 27117 Date Mfg 11 07 2005 Calibrated By DL Software GP07R23 Mfg 2 Figure 11 Manufacturer Data Displays Miscellaneous Mode The Miscellaneous mode is accessed by pressing the button above the Misc label in the upper right hand corner of the Select Menu display The screen will appear as shown in Figure 12 Push the button above Select to move the curso...

Page 17: ...he UP and DOWN buttons at the bottom of the display change the display zero deadband value as desired Pressure Averaging It is sometimes advantageous to apply an averaging factor to the pressure output and display to make it easier to read and interpret rapidly fluctuating pressures Pressure averaging can be adjusted between 1 no averaging and 256 maximum averaging This is a geometric running aver...

Page 18: ...ated in the upper left corner of the display will move the line gauge pressure to the primary display Line Temperature Pressing the dynamically labeled C button located in the upper middle of the display will move the process temperature to the primary display Volume The volume flow rate is defaulted on the primary display Pressing the dynamically labeled Volume button will move the volume flow ra...

Page 19: ...r our Local Set Point Module LSPM described on page 37 Select Loop Input P 200 Analog D 500 Volume Serial AUT0on Local Set 0 00 Control Up Down Setup Figure 14 LC Series Control Setup Display Input LC Series Flow Controllers normally ship defaulted to analog control as indicated in Figure 14 above To change how the set point will be conveyed to the controller push the button in the upper right han...

Page 20: ...abel Select until the selection arrow is pointing to the parameter you wish to change When the parameter you wish to change is selected it may be adjusted up or down with the buttons under the display below the dynamic labels UP and DOWN Press the buttons repeatedly to make slow adjustments or hold them down to make fast adjustments P refers to the Proportional term of the PID loop Before changing...

Page 21: ... communications menu on the meter and an 8 N 1 None 8 Data Bits No Parity 1 Stop Bit and no Flow Control protocol Under the Settings tab make sure the Terminal Emulation is set to ANSI or Auto Detect Click on the ASCII Setup button and be sure the Send Line Ends with Line Feeds box is not checked and the Echo Typed Characters Locally box and the Append Line Feeds to Incoming Lines boxes are checke...

Page 22: ...to warm up and re zero it If possible it is helpful to zero the unit near the expected operating pressure by positively blocking the flow downstream of the flow meter prior to entering the Tare command Zeroing the unit while there is any flow will directly affect the accuracy by providing a false zero point If in doubt about whether the flow is positively blocked remove it from the line and positi...

Page 23: ...ll respond by reading the current value for register 22 between 0 65535 It is good practice to write this value down so you can return to the factory settings if necessary Enter the value you wish to try by writing the new value to register 22 For example if you wished to try a D term of 25 you would type W22 25 followed by Enter where the bold number denotes the new value The computer will respon...

Page 24: ...This separates the data into columns for manipulation and removes symbols such as the plus signs from the numbers Once the data is in this format it can be graphed or manipulated as desired For extended term data capture see Sending a Simple Script to HyperTerminal on page 25 Data Format The data stream on the screen represents the flow parameters of the main mode in the units shown on the display...

Page 25: ...6 A file conversion box will appear In the End Lines With drop down box select CR Only Everything else can be left as default 7 Click O K 8 You have now created a script file to send to HyperTerminal Close the file and exit the text editing program 9 Open HyperTerminal and establish communication with your flow device as outlined in the manual 10 Set the flow device to Polling Mode as described in...

Page 26: ...d for bi directional flow and no damage will result My controller does not respond to the set point Check the control set up screen to be sure the Input parameter selection matches the set point you are trying to use Also be sure that the unit was ordered for the type of analog signal you are trying to use After installation there is no flow Alicat Scientific LC Series controllers incorporate norm...

Page 27: ...ferent reactions to the set point than I expect Conditions considerably different than those at which the device was originally set up can necessitate a re tuning of the PID loop Avoid long runs of small diameter tubing in the system increase line size RS 232 Serial Communications is not responding Check that your meter is powered and connected properly Be sure that the port on the computer to whi...

Page 28: ...r should be returned to the factory for recalibration near the listed due date Before calling to schedule a recalibration please note the serial number on the back of the meter The Serial Number Model Number and Date of Manufacture are also available on the Manufacture Data 2 screen page 16 Cleaning L and LC Series Flow Meters require no periodic cleaning If necessary the outside of the meter can ...

Page 29: ...lers Add 400 Series Stainless Steel Brass 1 15 volts required for 4 20mA output 2 If your application demands a different material please contact Application Assistance for available options Mechanical Specifications Full Scale Flow Mechanical Dimensions Process Connections1 Pressure Drop2 PSID L Series 0 5CCM to 1CCM 4 4 H x 2 4 W x 1 1 D M5 10 32 Female Thread 2 0 2CCM to 500CCM 4 6 H x 2 4 W x ...

Page 30: ...20CCM 0 50CCM 0 100CCM 0 200CCM 0 500CCM 0 1LPM 520 290 6060 Ph 520 290 0109 Fax 2045 N Forbes Blvd Suite 103 Tucson AZ 8 Alicat Scientific Inc Rev No Description Date Alicat Scientific Inc 520 290 6060 Ph 520 290 0109 Fax 2045 N Forbes Blvd Suite 103 Tucson AZ 8 ...

Page 31: ...31 L Series 0 2LPM 0 5LPM 0 10 LPM LC Series 0 0 5CCM 0 1CCM 2045 N Forbes Blvd Suite 103 Tucson AZ 8574 520 290 6060 Ph 520 290 0109 Fax Alicat Scientific Inc Alicat Sci 2045 N Forbes Blvd 520 290 6060 ...

Page 32: ...Rev No Description Date LC Series 0 5CCM 0 10CCM 0 20CCM 0 50CCM 0 100CCM 0 200CCM 0 500CCM LCR Series 0 1LPM 520 290 6060 Ph 520 290 0109 Fax 2045 N Forbes Blvd Suite 103 Tucson AZ 85745 Alicat Scientific Inc Description Date ...

Page 33: ...33 LCR Series 0 2LPM 0 5LPM 520 290 6060 Ph 520 290 0109 Fax 2045 N Forbes Blvd Suite 103 Tucson AZ 85745 Alicat Scientific Inc Rev No Description Date ...

Page 34: ...ution the maximum count would be 999999 liters Rollover The customer can also specify at the time of order what the totalizer is to do when the maximum count is reached The following options may be specified No Rollover When the counter reaches the maximum count it stops counting until the counter is cleared Rollover When the counter reaches the maximum count it automatically rolls over to zero an...

Page 35: ...tor that the battery may be approaching the end of its life is a sharp increase in the temperature indicated on the meter This false signal can result when the voltage drops below its normally regulated level This can affect the accuracy of the meter so it is good practice to check that the temperature is approximately correct 25 C is about room temperature or use a fresh battery especially if the...

Page 36: ...ews trapped in the bottom of the battery pack will not allow the plug to be completely inserted into the socket until they are screwed into place Slip the included hex wrench into either of the two holes on the top of the battery pack as shown in Figure 10 and start the screw into the corresponding threaded hole in the top of the meter Before the screw is tightened down all the way move the hex wr...

Page 37: ...he set point or the process measurement Set point Adjustment Knob provides simple dial it in process changes Display button switches display between actual set point and measured flow parameter LED indicator switches from green to red when the measured parameter deviates from the set point by more than 2 of full scale Operation Notes The LSPM requires a double ended DC 62 8 Pin Mini DIN cable conn...

Page 38: ...lation point Maximum distance between electronics and sensor package is 6 feet Accessory BB 9 Multi Drop Box The BB 9 Multi Drop Box makes it convenient to wire multiple flow and or pressure devices to a single RS 232 port The Multi Drop Box has nine 8 pin mini DIN ports available The ports are to be used with a standard double ended 8 pin mini DIN DC 62 style cable going from the box to each flow...

Page 39: ... your computer Session Saving Your current configuration data can be saved and reloaded for ease of experiment repetition Data Capturing Logging Captures data from your flow or pressure units and logs it in a Microsoft Excel file or plain text file making it easy to graph and track your test data Script Building Allows you to create scripts that change or sample your flow or pressure unit s settin...

Page 40: ...able 6 Pin single ended 10 foot length PVPS AC to DC 12 Volt Power Supply Adapter PVPS24 AC to DC 24 Volt Power Supply Adapter PVPSE AC to DC 12 Volt European Power SupplyAdapter PVPSE24 AC to DC 24 Volt European Power Supply Adapter RS485 KIT RS 232 to RS 485 Converter RD Remote Panel Mount Display ALICAT DEVICE PROCESS CONNECTION M5 10 32 1 8 1 4 1 2 3 4 COMPRESSION FITTING 1 8 SS 200 1 0157 SS ...

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